SAW quadrature binary modulation system applications

A surface acoustic wave (SAW) modulation system has been built, using a combination of a digital message sequence, an impulse driver, and different SAW modulator filters, for experimental testing of a wide variety of quadrature binary modulation schemes. The RF testbed is described and characterized...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 1993-09, Vol.40 (5), p.496-503
Main Authors: Vigil, A.J., Belkerdid, M.A., Malocha, D.C.
Format: Article
Language:English
Subjects:
Acoustic distortion
Acoustic testing
Acoustic waves
Applied sciences
Digital filters
Digital modulation
Dynamic range
Exact sciences and technology
Impulse testing
Radio frequency
Surface acoustic waves
System testing
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:A surface acoustic wave (SAW) modulation system has been built, using a combination of a digital message sequence, an impulse driver, and different SAW modulator filters, for experimental testing of a wide variety of quadrature binary modulation schemes. The RF testbed is described and characterized for system distortion, dynamic range, and spurious responses, and system optimization is discussed. Nine different SAW modulator filters having different time- and frequency-domain responses were designed and fabricated for use in the system. Several of the designs are representative of new modulation schemes which offer better spectral confinement; and time-domain envelope uniformity than MSK. The results obtained with the designed SAW quadrature binary modulation system are presented. Excellent agreement between time- and frequency-domain measurements and theoretical predictions using the SAW modulation system are shown.< >
ISSN:0885-3010
1525-8955
DOI:10.1109/58.238101